Severe Thunderstorms in the Upper Midwest; Heat Continues in the Southwest

Scattered severe thunderstorms may produce damaging winds, large hail, a tornado or two, and heavy rain across parts of the Upper Midwest, mainly this evening through Saturday. Very hot temperatures will continue through today across the Desert Southwest, which could break daily high temperature records. Read More >

Hazardous Weather Conditions

Current conditions at

De Kalb Taylor Municipal Airport (KDKB)

Lat: 41.93°NLon: 88.71°WElev: 909ft.

Fog/Mist

69°F

21°C

Humidity 100%
Wind Speed S 6 mph
Barometer 30.07 in
Dewpoint 69°F (21°C)
Visibility 3.00 mi
Last update 8 Aug 6:55 am CDT
Extended Forecast for

Sycamore IL

  • Today

    Today: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 90. Heat index values as high as 98. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 90 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 72. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 72 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 90. Heat index values as high as 100. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 90 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 71. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 86. South southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 86 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 84.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms.  Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    T-storms

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 90. Heat index values as high as 98. South wind 5 to 15 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 72. South wind around 10 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny, with a high near 90. Heat index values as high as 100. South wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South wind around 10 mph, with gusts as high as 20 mph.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86. South southwest wind around 10 mph, with gusts as high as 20 mph.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Monday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
Partly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Sycamore IL
 42°N 88.69°W
6:27 am CDT Aug 8, 2025
7am CDT Aug 8, 2025-6pm CDT Aug 14, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database